Features one-touch pneumatic seat height adjustment and a sculptured foam seat and back that allows you to sit comfortably and personalize the way you work Height adjustable foot ring enhances your posture, while heavy duty nylon base with dual wheel carpet casters allow you to move smoothly and efficiently Approved for commercial use GREENGUARD Certified - an interior product made with materials that have low chemical emissions, improving the quality of the air in which it is used Overall Size: 23.5” W x 22.75” D x 38.5-48.5” H; Seat Size: 17.25” W x 17.5” D x 2.5” T; Back Size: 17.5” W x 11.75” H x 1.5” T; Seat Range: 24” - 34”